Can cats lose their minds?

CatsCan cats lose their minds?, Otherwise healthy 14 year old male cat.
He's acting oddly lately....crankier....he behaves much like a dog now....follows the humans from room to room, stretches out in the middle of the ...

He's acting oddly lately....crankier....he behaves much like a dog now....follows the humans from room to room, stretches out in the middle of the floor to hang with the humans, no longer likes to be alone.....doesn't play as vigorously or with as much interest....

And stares at the wall for hours on end.....occasionally following "something" with his gaze that just ain't there....